GORG- Atomic Structure Manipulatives
Technology
Observable
Theories
Tools
Understanding
Observations
Rutherford’s Model
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Atoms contain a positively charged
central nucleus containing protons.
Much smaller electrons surround the
atom’s nucleus.
1805
Modern Atomic Model
-
-
-
Atoms contain a positively charged
central nucleus of proton and
neutrons.
Neutrons have no charge but add mass
to an atom.
Electrons orbit in a cloudlike region
surrounding the nucleus.
1897
Dalton’s Model
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All matter made of atoms
Atoms are smooth, solid, spheres –
like marbles
1911
Thompson’s Model
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Atoms contain negatively charged
particles called electrons.
Electrons were balanced by positively
charged main body of the atom
1913
Bohr’s Model
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Atoms contain a positively charged
central nucleus of protons.
Electrons orbit the nucleus in well
organized “shells.”
1932Current
Tentative